No I haven’t found a solution. Brent was supposed to check it out in the Metra lab but hasn’t responded since

My Roku is older but a friend of mine has a newer Roku, using a different down mixer and started having the same problem with the upgrade to hbo max. We’ve both set the Roku to pcm and it solved the issue. Although it is a pain to go into settings to flip back and forth. A dedicated Roku for the HT is an option. But I like the option of pausing the movie in the theatre and instantly continuing in another room (i know, waaaa)

Again, it seems that hbo max (and vudu) is broadcasting in DD+ and the Metra can’t deal with it. All other streaming formats sound fine, so they must broadcast in a different bitstream that the Metra IS capable of down mixing?